Probe .020 piston measurements?

redhot91gt

Grenade Builder
Nov 9, 2008
126
0
16
Mesa, AZ
Anyone have the measurements ont heir .020 oversized Probes? I recently had my block bored for .020 oversized NPR's and now I am going to go ahead and get Probes, but before I do, I wanted to make sure they are big enough. My bores were all pretty close but the smallest was 3.2901 and I'd like to keep a .0035 piston to wall clearance. So Id need the probes to be atleast 3.2866. If they are bigger I will just have the block rehoned/bored. I just cant have any of them smaller than this. Is this too close to call? Should I just go with the .040 over?

Thanks in advance
-Stu